I absolutely did not start writing these books to encourage any child into witchcraft. … I'm laughing slightly because to me, the idea is absurd.
I have met thousands of children now, and not even one time has a child come up to me and said, "Ms. Rowling, I'm so glad I've read these books because now I want to be a witch." They see it for what it is... It is a fantasy world and they understand that completely.
As quoted in "Success of Harry Potter bowls author over" at CNN.com (21 October 1999); also quoted in "Urban Legends Reference Pages : Harry Potter" at Snopes.com